Crucial memory 4 gb 2 x 2 gb dimm 240 pin ddr3 1600 mhz pc3 12800 cl11 15 v unbuffered non ecc for asus p6x58d premium product name 2 2gb 240 pin dimm 256mx64 ddr3 pc3 12800 unbuffered product type ram module memory voltage 150 v memory standard ddr3 1600pc3 12800 memory technology ddr3 sdram cas latency cl11 memory size 4 gb form factor dimm memory speed 1600 mhz error checking non ecc number of pins 240 pin signal processing unbuffered compatibility giga byte ga h61